MICHIGAN MECHANIC CERTIFICATION- HVAC 2025 UPDATE|
COMPREHENSIVE QUESTIONS AND VERIFIED ANSWERS
(COMPLETE SOLUTIONS) ASSURED SUCCESS|GRADE A+!!
Question 1
When diagnosing a cooling system leak, which two methods are commonly
used?
A) Visual inspection and sound test
B) Radiator cap test and hose check
C) Pressure test or dye test
D) Thermostat check and fan operation
E) Coolant level check and temperature gauge reading
Correct Answer: C) Pressure test or dye test
Rationale: Pressure testing the system or introducing a fluorescent
dye into the coolant are standard methods for pinpointing leaks in
the cooling system.
Question 2
What is the primary purpose of a radiator in a vehicle's cooling system?
A) To circulate coolant throughout the engine.
B) To store excess coolant.
C) To dissipate heat that is picked up by coolant in the engine into
the air passing through its fins and tubes.
D) To regulate the flow of coolant.
E) To filter contaminants from the coolant.
Correct Answer: C) To dissipate heat that is picked up by coolant in the
COMPREHENSIVE QUESTIONS AND VERIFIED ANSWERS
(COMPLETE SOLUTIONS) ASSURED SUCCESS|GRADE A+!!
Question 1
When diagnosing a cooling system leak, which two methods are commonly
used?
A) Visual inspection and sound test
B) Radiator cap test and hose check
C) Pressure test or dye test
D) Thermostat check and fan operation
E) Coolant level check and temperature gauge reading
Correct Answer: C) Pressure test or dye test
Rationale: Pressure testing the system or introducing a fluorescent
dye into the coolant are standard methods for pinpointing leaks in
the cooling system.
Question 2
What is the primary purpose of a radiator in a vehicle's cooling system?
A) To circulate coolant throughout the engine.
B) To store excess coolant.
C) To dissipate heat that is picked up by coolant in the engine into
the air passing through its fins and tubes.
D) To regulate the flow of coolant.
E) To filter contaminants from the coolant.
Correct Answer: C) To dissipate heat that is picked up by coolant in the
